Iterating through records

Question

I am trying to iterate one by one through a resultset and populate the textfields with the data. It brings in the first record in the database and the last. However it wont bring in the middle one. Here is a copy of the source code.
try
con= DriverManager.getConnection(url,"app","app");
stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_UPDATABLE);
querynext= "Select * from CoffeeSuppliers";
results = stmt.executeQuery(querynext);
String nextID="";
String nextName = "";
String nextAddr = "";
String nextCity= "";
String nextState= "";
String nextzip= "";
String output ="";
while(results.next())
nextID= results.getString(1);
nextName= results.getString(2);
nextAddr= results.getString(3);
nextCity= results.getString(4);
nextState= results.getString(5);
nextzip = results.getString(6);
comp_ID.setText(nextID);
comp_Name.setText(nextName);
comp_Addr.setText(nextAddr);
comp_City.setText(nextCity);
comp_State.setText(nextState);
comp_zipcode.setText(nextzip);
}//end the while
con.close();
stmt.close();
catch(SQLException sqlex)
System.err.println("ERROR: " + sqlex.getMessage());
}// end the if statement
}// end the actionPerformed function
Any feedback will be great.

Answer 1

Hi,
Model for
Getting Records from DB in Servlet - Store into Bean - Add to ArrayList and set to access - Via Jsp Display the Records.
//Bean File
public class ProductBean
     public String pname          = null;
     public int totalqty          = 0;
     public int pid               = 0;
     public ProductBean(){}
     public ProductBean ( int pid, String pname,  int totalqty )
     this.pid           = pid;
     this.pname           = pname;
     this.totalqty      = totalqty;
     //setter methods
     public void setPid(int pid) { this.pid= pid;     }
     public void setPname(String pname){ this.pname = pname; }
     public void setTotalqty(int totalqty){ this.totalqty = totalqty; }
     //getter methods
     public int getPid() { return pid; }
     public String getPname() { return pname; }
     public int getTotalqty() { return totalqty; }
//Servlet File
public void doPost ( HttpServletRequest req, HttpServletResponse res ) throws ServletException,IOException
          res.setContentType ( "text/html" );
          ArrayList al     = al = new ArrayList ();
          ProductBean pb = null;
          ResultSet rs   = null;
          HttpSession hs     = req.getSession (true);
          try
               //connection statements
          Statement stmt = con.createStatement( ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE );
          rs = stmt.executeQuery ( "select pid,pname,ptotalqty from producttable order by pid" );
          while ( rs.next () )
          pb = new ProductBean ( rs.getInt(1), rs.getString (2), rs.getInt (3) );     // passing all values to bean
          al.add ( pb );                                            // add into arrayList
          pb = null;
          //set that final ArrayList
          hs.setAttribute ( "al", al );
          rs.close ();
          res.sendRedirect ( "./Displayproduct.jsp");
          catch ( SQLException e )
               out.println ( e.getMessage () );
     //Jsp file
     <%
     //displaying Records
     ArrayList al     = new ArrayList();
     ProductBean pb     = null;
     al = (ArrayList) session.getAttribute ( "al" );
          for ( int i = 0; i < al.size(); i++ )
          pb = (ProductBean) al.get(i);
          out.println( pb.getPid () + " " + pb.getPname() + " " + pb.getTotalqty() +"<br>");
     //set session al to null
     session.setAttribute ( "al", null );
     pb = null;
     %>               *************************** Now you to Modify ***********************